The First Great Ninja War was not a singular, explosive event. It was a slow, suffocating constriction of the village's arteries.
Konoha was new, but it was not weak. The Senju and Uchiha clans provided a terrifying vanguard of adult manpower. The strategy was clear: spend the veterans to protect the seed corn. The logic was sound, but the atmosphere it created was ghostly.
Every week, the village grew quieter. The bustling streets thinned out. The men who bought bread from the Nanami bakery—loud men, laughing men, men who pinched Kento's cheek—simply vanished, replaced by sombre wives wearing black armbands.
Nanami Kento, now eight years old, watched the war from the window of his room.
His "Grindstone" training with Tobirama had officially stalled. The Hokage was no longer in the village; he was on the front lines, directing the chaotic symphony of battle against enemy forces. The Hokage Guard—Hiruzen, Danzo, Kagami, and the others—were commanding battalions.
Nanami was left to his own devices. He was a disciple without a master, a weapon sitting on a shelf while the war raged outside.
"Inefficient," Nanami muttered, dipping his bone brush into a pot of green ink. "But necessary. If they send eight-year-olds to the front, the village has already lost."
He turned his attention back to the scroll on his desk.
Project: Stasis-Regeneration (Healing Tag).
It was his current obsession. A logical progression from the Vacuum-Stasis Array. If he could seal thermal energy to keep tea hot, could he seal biological energy to knit flesh?
The answer, so far, was a frustrating 'no'.
"Chakra is fuel," Nanami lectured his Clone 1, who was reading a medical anatomy book in the corner. "But healing is a biological process. It requires cell division. To create a tag that heals, I need to automate the Yang Release command for 'divide and repair'."
Clone 1 sighed, turning a page. "The problem is the targeting. A generic 'heal' command applied to a healthy arm causes tumors. Applied to a cut, it works. The seal needs a diagnostic layer."
"A diagnostic layer requiring sentient chakra feedback," Nanami rubbed his temples. "I am trying to build a doctor out of ink. It is proving... difficult."
He scrapped the current design. The paper smoldered as he burned it with a tiny flick of fire chakra.
"Next iteration," he ordered. "Focus on clotting first. Tissue knitting later."
The year dragged on.
Without the daily beatings from the Hokage Guard, Nanami doubled down on his personal conditioning.
Training Ground 4 became his sanctuary. It was the only place where the war didn't exist. There were no grieving widows here, no grim news reports. Just the wood, the wind, and the punch.
He had hit a plateau.
3,000 punches had become 5,000. Then 6,000.
But his body was lagging. His muscles were dense, his bones hardened by chakra and calcium, but he was still a child. There was a hard cap on how much force a skeletal structure of his size could generate.
He felt the Netero Template pushing against the ceiling of his biology. The memories of the Chairman were vivid now—memories of standing on a snowy mountain, of flesh withering away until only spirit remained.
Spirit, Nanami thought, assuming the stance. Chakra is physical energy times spiritual energy. But Netero didn't use chakra. He used something else.
The sun was rising. The sky was a bruised purple, bleeding into gold.
Nanami closed his eyes.
"One."
He punched.
The motion was perfect. No wasted energy. No sound.
"Two."
He punched.
He sank deeper into the meditation. He stopped feeling his arms. He stopped feeling the chakra coursing through his coils. He searched for something deeper. Something more primal.
Chakra was a resource you burned. It was fuel.
But what about the engine itself? What about the life force that existed before it was molded into jutsu?
"Four thousand."
The sweat dripped from his nose. His breathing was a metronome.
Gratitude.
It wasn't just a word. It was an emotion that filled him. Gratitude for the air. Gratitude for the ground. Gratitude for the sheer, impossible luck of being alive in a world of death.
As he reached punch number five thousand, something inside him clicked.
It wasn't the opening of a chakra gate. It wasn't the rush of elemental energy.
It felt like a dam breaking in his pores.
A heavy, viscous substance flooded out of him. It wasn't blue like chakra. It was white. It was warm. It felt like he was suddenly submerged in thick, comfortable water.
The air around him warped. The grass at his feet flattened, not from wind, but from pressure.
Nanami opened his eyes.
He looked at his hands. They were glowing.
But it wasn't the flicker of chakra. It was a steady, roaring flame of white energy that clung to his skin like a second layer of flesh. It didn't dissipate. It didn't burn out. It just... existed.
"This is not chakra," Nanami whispered.
The memories of Isaac Netero surged forward, unlocking a file that had been encrypted until this very moment.
NEN.
The ability to manipulate one's own life energy. Aura.
Nanami stood frozen.
Chakra was a blend of physical and spiritual energy, molded for specific tasks. Nen was the spiritual energy, raw and unfiltered, amplified by will.
"Ten," Nanami recited the memory. Envelop.
He focused. The wild, roaring aura calmed. He visualized it containing itself, wrapping around his body like a suit of armor.
The white flame settled. It hugged his skin, condensing into a millimetre-thick coating of hyper-dense energy.
He felt... invincible.
It was different from chakra enhancement. Chakra enhancement made you faster and stronger, but it felt like running an engine at high RPMs. It was stressful.
Ten felt like coming home. It felt stable. It supported his bones. It reinforced his cells.
"This changes the calculus," Nanami murmured.
He looked at the large oak tree at the edge of the clearing—his usual punching bag, reinforced with layers of rope.
He walked up to it.
He didn't use chakra. He didn't use the Rasengan. He didn't even use the Netero Prayer mechanics.
He just used Ten—the basic shroud of aura.
He punched the tree. A casual, low-effort jab.
CRACK.
His fist didn't just hit the bark; it sank into it. The wood exploded outward as if he had hit it with a sledgehammer. The tree groaned, splintering halfway up the trunk.
Nanami pulled his hand back. There was no pain. The aura had acted as a perfect buffer.
"Durability increased by a factor of ten," Nanami noted, his heart racing. "Offensive output increased by a factor of five without chakra expenditure."
He sat down in the grass, maintaining the Ten.
This is the missing variable, he thought. My body is too young to handle high-level chakra output without damage—like the burns from the Rasengan. But Nen... Nen reinforces the container.
He closed his eyes.
The information flowed.
The Four Major Principles.
Ten (Envelop): Defense. Stability. Longevity.
Zetsu (Suppress): Stealth. Recovery. Hiding presence.
Ren (Refine): Explosive power. Intimidation. Increasing output.
Hatsu (Act): The personal expression of Nen. The special ability.
"I need to know my type," Nanami said aloud.
He scrambled to his bag. He didn't have the traditional glass of water and leaf setup ready, but he had a water bottle and plenty of leaves on the ground.
He took the cap off his water bottle. It was full. He picked a green oak leaf and placed it gently on the surface of the water inside the bottle.
He held the bottle with both hands.
"Ren," he whispered.
He flared his aura. He pushed the white energy from his hands into the bottle.
He watched the water. He watched the leaf.
In the Hunter x Hunter world, the results determined your category:
Enhancer: Volume of water changes.
Transmuter: Taste of water changes.
Emitter: The color of the water changes.
Conjurer: Impurities appear in water.
Manipulator: Leaf moves.
Specialist: Other effects.
Nanami stared intensely.
The water began to tremble.
Suddenly, the water level rose. It surged up the neck of the bottle and spilled over the rim, soaking Nanami's hands.
Enhancer.
Nanami smiled.
"Simple," he muttered. "Efficient. Brutal."
It fit. Netero was an Enhancer. It was the category of balance, of pure physical reinforcement. It was the category that allowed a man to punch faster than sound.
But then, something else happened.
As the water overflowed, the water inside the bottle began to change. Tiny, glittering crystals formed in the liquid, swirling around the leaf like diamond dust.
Nanami paused.
Impurities appearing... that's Conjuration.
The water continued to overflow (Enhancement), while crystals formed within it (Conjuration).
"Dual affinity?" Nanami frowned. "Or perhaps... Netero's soul provides the Enhancement, and my own desire to create structure provides the Conjuration."
He stopped the flow of aura. The water settled. The crystals dissolved back into nothingness.
He sat back, analyzing the data.
An Enhancer/Conjurer hybrid.
"Enhancement allows me to reinforce my body beyond human limits," Nanami strategized. "It solves my durability issue. It solves my speed cap."
"Conjuration..." He looked at the bone brush sticking out of his bag. "Allows me to materialize tools from thin air. It connects perfectly with Fuinjutsu. Eventually, I won't need ink or paper. I can conjure the seals directly into reality."
He lay back on the grass, looking up at the morning sky.
The war was raging. The world was dangerous. But for the first time in a year, Nanami felt a surge of genuine optimism.
He had a second engine.
---
Nen and Chakra. Two distinct power systems.
Nanami sat in the lotus position, analyzing the two energies swirling within him.
They are immiscible, like oil and water. Chakra is volatile; it wants to explode, to transform, to burn. Nen is viscous; it wants to protect, to cover, to enhance.
If I try to mix them now, I will likely blow up a limb. Or burn out my chakra coils. It would be like pouring jet fuel into a diesel engine. They operate on different frequencies.
I will keep them separate. Strict compartmentalization.
Chakra for the external world—elements, illusions, sealing. Nen for the internal world—reinforcement, defense, will.
Only when I have achieved absolute mastery over both sources will I attempt fusion. Until then, they run parallel.
And I know what lies at the end of this path. The memories are clear now. I have access to everything. The golden avatar. The 100-Type Guanyin Bodhisattva. The Zero Hand.
It is all waiting for me. I just need to build the capacity to summon it.
The rest of the day was a blur of discovery.
Nanami practiced Zetsu, shutting off his aura nodes. He found that it made him practically invisible to sensory perception, even more so than suppressing the chakra. It was a stealth mode that erased presence.
Then, he tested Ren.
He stood in the center of the clearing and pushed his aura out. He didn't just coat his body; he projected it. He pushed his malice, his will, his intent into the air.
A rustle in the bushes caught his attention.
A large wild boar, likely attracted by the smell of Nanami's lunch, charged into the clearing. It was huge, with tusks that could rip a man open. It squealed, pawing the ground, ready to attack the small boy.
Nanami didn't take a stance. He didn't draw a kunai.
He simply turned his head and directed his Ren at the animal.
Sit.
The blast of killing intent—pure, condensed aura—hit the boar like a physical wall.
The animal didn't run. It didn't squeal.
It froze mid-stride. Its eyes rolled back into its head. It collapsed onto its side, twitching once before going still.
Nanami walked over and checked its pulse. There was none.
"Cardiac arrest," Nanami noted, his voice devoid of emotion. "Induced by sheer spiritual pressure. Weaponized intent."
It was a terrifying ability. Against a civilian or a weak-willed ninja, he wouldn't even need to lift a finger. He could just wish them dead.
He retracted his aura, returning to a state of Ten.
The sun began to set.
Nanami gathered his things. He looked at the dead boar.
Waste not, he thought. He sealed the carcass into a storage scroll. Free meat for the bakery.
He walked home in the twilight.
He didn't go to his desk to work on the healing tag. He didn't practice calligraphy.
He sat on his bed and meditated, cycling his Nen, feeling the warm, heavy power reinforcing his bones.
The war was out there. Tobirama was fighting for his life. The village was mourning.
But in this small room, Nanami Kento had just unlocked the door to a power that this world had never seen.